Reversffil



D. R. HILLIS July 25, 1939.

REVERSIBLE LUBHICATINC- FEEDER SYSTEM Original Filed March 16, 1951 6 Sheets-Sheet 1 To Bacrr 35 P/WM INVENTOR. gill/1.51 3 ATTORNEY.

July 25, 1939. i D. R. HlLLlS Re. 21,160

REVERSIBLE LUBRICATINC- FEEDER SYSTEM Original Filed March 16, 1951 e Sheets-Sheet 2 DHVID EHILLIEL ATTORNEY.

July 25, 1939; D. R. HILLIS REVERSIBLE LUBRICATINC- FEEDER SYSTEM ori inal Filed March 16, 19:51

6 Sheets-Sheet 5 glmmullhm INVENTOR. 05 v10 5. HIL L15.

ATTORNEY.

July 25, 1939.

nix /33 /70 m7 Y m D. R. HILLIS REVERSIBLE LUBRICATING' FEEDER SYSTEM Original Filed March 16, 1931 6 Sheets- Sheet 5 v INVENTOR. 75 v1. .7 1?- ML L125.

July 25, 1939.

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Reissued July 25, 1939 UNITED" STATES;

Rem

PATENT OFFICE Original No. 2,094,271, dated September 28, 1937, Serial No. 523,149, March 16, 1931. Application for reissue July 5, 1938, Serial No. 217,590

71 Claims. (01 184-7) The .present invention relates to lubricatingysylstems, and more particularly to a reversible lubricating system.

The main object of the invention is the provi- 6 slon of a single-pipe circuit, flow-reversing, telltale lubricating system which will distribute fluids, gases, air or plastic material and particularly lubricant to a plurality of associated devices through a series of feeders or measuring devices connected thereto when the same is forced c through the feeders in either directionoi .flow and which will indicate whether or not there is a leak in the circuit, or a clo'gged bearing or whether the circuit isobstructed or whether the system is working satisfactorily.

Other objects are toprovide a system which is positive in its'action, which-will handle various kinds of fluids and which will deliver a measured quantity thereof to each hearing or associated device which is so simple in construction as to be practically tool-proof: and which is durable and operates in all seasons without any changes.

. These and other objects will appear as the description progresses, reference being-had to the accompanying drawings in which:

Figure 1 is a schematic general view of my new and improved lubricating system, showing some oi' the parts in section;

Figure 2 is a plan section view taken on the line -z-2o1"ig.1; p

Figure 3 is a schematic view showing a modified form or distributorand indicator in section;

Fig. 4 is a side elevation of my automatically operated valve with ports and connection passages shown in dotted lines, being an enlargement of the valve as schematically shown in Fig, 1;

Fig. 5 is a plan sectional view of the entire automatic flow reversing valve taken on line H 0:,

50 Fig; 10 is a plan sectional view taken on line lI--lll 01118.9; v v

. Fig. 11 is a sectional view taken on line 9-8 of Fig. 8 with the valves shown in a position opposite to that shown in Fig. 9; and

'55 Fig. 12 is .a plan sectional view taken on line mounted on a shaft 2| supported on the hollow I head 8 and the segment is turned on the shaft by Illof Fig. 9 with the pistonvalves shown in a position-opposite to that shown in Fig. 10.

Reference will now be made to the drawings in which like reference characters designate like parts throughout. 5

' The numeral i represents a pump which is connected to and delivers lubricant under pressure to a lubricant flow-reversing and circuit-indicating device 2 which in turn is connected to both ends of a circuit pipe-line or conduit lwhich is equipped 10 with a plurality of reversible feeders 4 provided with by-pass means as hereinafter described, and there is a return pipe 5 which returns lubricant device to the pump reservoir.

The pump l comprises a cylinder Shaving a cap I and a hollow head 8 having a circular bore 9 screwthrea'ded to receive a sleeve III, the inner end of which is screened by a suitable screerr ll secured thereto in any suitable manner. The sleeve 20 III has a spider l2 which may be integral therewith and which is also perforated and screwthreaded in the center to receive a hollow screw l3 having a head ll. A floating disk valve [5 slides on the screw it between the spider l2 and the head ll. I

The hollow head 8 of the pump has an extending supporting portion 9' receiving one end of the I piston II the other end of the piston being received in.the bore and sleeve. The piston It has a cen-' 3 tral passage .l'l which is c'ounterbored as at' l8 which receives the head it of the screw l2. Radial passages l9 are drilled'in the piston and permit the lubricant to how from the central pas- I sage l'l into an annular chamber in the nozzle 35 portion 8' of the hollow head 8 surrounding the reduced portion it of .thepiston Ii. The passage I1 is counterbored at the discharge end as at 20 to accommodate a floating valve 2i and is screwthe valve. k I

The piston I6 is provided with attack 23 which registers with and is operated by a segment 24 threaded to receive a sleeve 22 acting. as a seat for a handle 26. v

- The portion 8' o! the hollow head 8 surrounding the piston is sealed by anys 'uitable means such as the packing gland 21 and the nut 28. so

Iv have shown the outlet end of the portion 9 as screw threaded to fltany suitable piping con-'-' nection such as 29 which is suitably connected to a conduit 3| conveying the fluid to the flow-. reversing and circrut-indicating member 2 56 irom the flow-reversing and circuit-indicating through a port 3| therein, although the pum may be fitted directly to the port 3|.

The port 3| communicates with two passageways 32, and 33. The passage 32 leads to a valve chamber 34. The passage 33 leads to-,a valve. chamber 35.

A piston valve 36 having depressed portions 31, 38 and 39 providing valves 48,'4|, 42 and 43 is mounted to reciprocate in the valve chamber 34. The piston valve 36 is provided with an abutment member 44 and a cup leatherpiston 45 at one end and a similar abutment member 46 and similar leather piston 41 at the other end.

The end of the valve chamber 34 in which abutment 44 is mounted communicates withvalve chamber 35 through a passage 48 and the oppo-' site end of the valve chamber 34 communicates with the valve chamber 35 through a passage 49.

A piston valve 50 is mounted in the valve chamber 35 and is provided with depressed portions 5|, 52 and 53 providing valves 54, 55, 56 and 51. The valve 51 is provided with an extension 51 which slides through a perforated nut and sealing gland so as to indicate the movement of the piston valve 50, as well as the movement of the double headed piston 58 which actuates it.

The piston 56 reciprocates in a cylinder 59 which has a passagewayv6|l connecting one end of the cylinder with a valve chamber 6| and a second passageway 62 connecting the other end of the cylinder with said valve-chamber 6|.

The valve chamber 6| has a dumb-bell piston type valve 6| adapted to reciprocate therein and communicates with an outlet passage 63 com- -municating with the return discharge port 64 to which the pipe, or conduit 5 is connected and said pipe 5 is connected to the pump reservoir in any suitable manner as at 65.

One end of the valve chamber 6| communicates with the annular passage in valve chamber 34 surrounding reduced portion 31 of the piston valve 36, between valves 40 and 4|, through a.

passage 66 and the other end of the valve chamber 6| communicates with the annular passage in valve chamber 34 surrounding reduced portion 39 of the piston valve 36, between valves 42 and 43, through a passage 61.

Leading from the valve chamber 34. in such manner as to be blocked by the valve 46, when in the position shown in Figs. 1, 4, 5 and 9 in the drawings, and so as to communicate with the annular passage surrounding the reduced portion 31 of the piston valve 36 when it shifts to the ,position shown in Fig. 11 thereof, is a duct 68 leading to a return passage 69 which opens into the outlet passage 63. A similar duct'16 communicates between the valve chamber 34 and the passage 69 in such manner that it registers with the annular passage surrounding reduced portion 39 of thepiston valve 36 when in the position shown in Figs. 1, 4, 5 and 9 and when the piston shifts to the position shown in Fig. 11, the duct 10 is closed by the valve 43..

" Another passage 1| connects the valve chamber 35 to the return passage 69 and said passage 1| always registers with the annular passage surrounding the reduced portion 5| of the piston valve 58in the valve chamber 35 between valves 54 and 55. H

A passage 12 connects the valve chamber 34 to One dual service port 13 which receives'one-end of the conduit 3 and said passage 12 is arranged,

in such manner that when the piston valve 38 is in the position shown in Figs. 1, 4, 5 and 9 it registers with the annular passage'surrounding Another passage 14 connects the valve chamber 34- to the other dual-service port 14 which receives the other end of the conduit 3. The passage14isso arranged that when the piston valve 36 is in the position shown in Figs. 1, 4, 5 and 9 it registers with the annular passage in the valve chamber 34-surrounding reduced portion 38 be-' tween valves 4| and 42 and so receives fluid entering said annular passage through the passage 32. When the piston valve 36 is shifted to the position shown in Fig. 11 the valve 42 prevents the passages 32 and 14 from communicating and the passage 14 then communicates with the passage 61 around the annular passage surrounding reduced portion 39 between valves 42 and 43.

A passageway 15 is drilled in the piston valve 50 connecting the annular passages surrounding reduced portions 5| and 53, the ports of said passageway 15 being designated .16 and 18' respectively.

When the piston valve 50 is in the position shown in Figs. 1, 2, 4, 9 and 10, the passageway 48 registers with the annular passage surrounding reduced portion 52 so that fluid entering said annular passage from passage 33 will pass into the passage 48 and shift the piston valve 36 in valve chamber -34 to the position shown in Figs. 1, 4, 5 and 9 and hold it there until the piston 58 again shifts when the passage 48 will register with the annular passage surrounding reduced portion 5| of the piston valve 50 as shown in Fig. 11 permitting lubricant-to pass through passage 48 to passages 1|, 69, 63 and through port 64 and pipe 5 back to the pump reservoir.

reservoir as above described, and when piston 58 shifts to the position shown in Figs. 11 and 12, passage 49 registers with the annular passage surrounding reduced portion 52 between valves 55 and 56 thus permitting fluid entering said annular passage under pressure from passage 33 to flow into the valve chamber 34 at the side of cup leather 41 and abutment 46 causing valve 36 and all its parts to shift to the position shown in Fig. 11.

The pipe line or conduit 3 may'have any number of feeders 4 of various sizes connectedto any number of bearings or associated devices, and one feeder may be used for one or more such bearings or associated devices by arranging suitable branch pipes, or two feeders may be conected to one uch bearing or associated device y merely pr viding a double valved connection. Each feeder 4 is provided with twoports 88 and 8| connected tothe pipe line or conduit 8 and a dischargeport 83 connected to an associated device or to a hearing or to a pipe-line or the valve chamber 86.. A dumb-bell piston type valve 89 having two heads 90 and 6| is mounted in said valve chamber 66 in such manner that the annular passage surrounding the reduced portion between said .valve heads 90 and 9| al- .ways connects one of the ducts 61 orill with discharge port 63 when the valve is in either one of its shifted positions and'at the same time opens the other duct QI'or 88 to the flow of fluid from the conduit, I p

The valve chamber)! has a similar dumbbell piston type valve 62 having heads 62 and 94.

The cylinder 84 has a duct. 95 communicating with the valve chamber 85' at approximately the central portion thereof. Said valve chamber 86' isalso provided with a duct 96 and another duct 91 so arranged that the valve heads 93- and 94 will permit lubricant flowing out of the cylinder 84 to pass through :one of these ducts to its "respective by-pass valve chamber, of which there are Fwo, designated 9a and as, in each of which "a slide valve of any ordinary type permitting fluid flow in one direction, is provided.

In-the modification shown in Fig. 3, the flow- -'-reve rsing-' and circuit-indicating member 2 comprises a block provided with an inlet port 3| and (two dual service ports I3 and I4 and a return discharge port 64 connected in like manner as the automatic device heretofore described.

- The block is cylindrically bored and the bore is screw-threaded at each end, one end receiving a heated perforated screw plug which receives fluid from the pump, and serves as the inlet 3 I, and the other'end receives a packing gland I throughwhich the hollow extension IIII of a rotary valve plug Ill2'exten'ds. The rotary valve I2 is mounted in the .boreand the extension IBI is reduced thus providing a shoulder I03 against which the packing gland presses thereby holding the rotary valveplug in place. v

The rotary valve plug is provided with a passage I04, one end-of which is adapted-to continuously register with the inlet port 3| and the other end of which is adapted to register with either port I3 or I4, depending on the position of the valve.

The rotary valve plugalso has another passage I65, one end of which continuously registers'.with the central chamber H0 in the hollow extension IDI, and the other end is adapted to register with either one of the ports I! or I4, always the one not registering at the'same time with passage I64. Mounted in the central chamber IIII, in the extension Ilil so as to close it, is a spring pressed piston valve assembly I06 which is also adapted to norniallyclose one end of the passage I66 and 'this valve has an extending stfm' I61 on which there is a second piston'valve which is adapted to'extend into-one end" ofthe passage I65. The valve. I08 has a tapered portion adapted to make entrance-to passage I06 easy after it has been forced out thereof by the flow of fluid returning from the pipe-line circuit.

The extension "I is cloled by a perforated IIIthrough which a rod or other indicating 'member II2 slides and the can also serves an abutment for the spring which closes the .v ve.

The central passage III] is always in communication with the return discharge port 64 by 5 reason of the fact that the bore of the body memher 2 is countersunk as at II3 thus providing an annular passage around the valve plug which communicates with said port 64 and radial passages II4 are drilled in the valve plug to communicate between the central passage H0 and the said annular passage in'the bore.

. The valve plug is manually operated by means ofa' handle. I I5.secured to the extension IIlI.

'. The numeral II6 represents a bearing or any other suitable receptacle, of which as heretofore described, there may be any number, and usually one branch pipe leads from each feeder to each hearing or receptacle. f

Assuming thatmy system with the automatic flow-reverser as illustrated in Figs. 1 and 2 and 4 to -12 inclusive is filled with lubricant, the

operation is as follows:

. The operatoroscillates the handle 26, thereby oscillating the segment 24 and reciprocating the piston I6 by means of the rack 23, so that as the handle -26 is raised to the position shown .the piston I6 is lowered and as the handle is lowered the piston is raised. On each downward stroke of the piston lubricant is forced into the conduit -3II as the slide valve 2| then closes the axially drilled passages I9, and the space within the sleeve Ill between the disk I2 and the enlarged end ofv the piston andaround the floating disk valve I5 is filled with lubricant by reason of suction and gravity and said lubricant is free of dirt and grit by reason 'of passing through the-screen II. On each upward stroke of'the piston some of the lubricant trapped between the valveli and the enlarged head of the piston is forced out through the small passage in the screw I3 and back through the, screen II into the reservoir of the-pump thus cleansing the screen, and as the passage through the screw is smaller than the passage II, the majority of said lubricant is forced through the passage II, forcing the slide valve 2| to its seat on the sleeve 22 thereby opening the passage H to the radial passages I9 through which said lubricant passes tothe annular passage around the reduced portion I6. of the piston I6 and below the moving parts of the piston.

As thelubricant is pumpedthrough the conduit 36 it enters the automatic flow-reversing and circult-indicating member 2 through the port 3| where part of. it will pass through passage 33 into 1,

the annular chamber in'valve chamber 35 surrounding reduced portion 52 of the piston valve 50 between valves 55 andifi from whence it will pass into passage. 48 and be conveyed into valve chamber 34 at the end adjacent'abutment 44 of the piston valve 36 and acting'on the leather pis-/ ton 45, where such isused or on the piston valve itself, will force the same to the position shown in Figures 1, 4, 5 and 9 and hold it there while the lubricant entering passage 32 is transmitted throughout the circuit in one direction. In order that the valve 36 maymove however, lubricant in the valve chamber 34 at the end in' which abutment 46 is located, must be displaced, and this therefore is forced through passage 49 to the am 7 nula'r passage in valyechamber 35 surrounding the reduced portion 53 and, thence through the drilled passage I5 in'the valve stem leading to the annular pasasge surrounding reduced portion 5i from which'it passesthrough'passage II to the into the annular passage in the valve chamber 34 surrounding reduced portion 38 of the piston valve 36 between valves 4| and 42 from whence it will pass into passage" as best seen in Figs. and 9 and thence through dual-service port 14' to one end of the pipe line-or'conduit 3passing to the first progressive measuring feeder 4 and entering the same through port 8| at which time the ports will be in the position shown in the feeder illus-' trated in section in Fig. 1. The flow of the lubricant will then force both dumb-bell type piston valves 89 and 92 to slide to their opposite positions thus blocking the'direct flow'of lubricant from the pprt 8| through valve chamber 65 at the same time opening the duct 88 to the flow of lubricantfrom the portal through valve chamber 86, thus passing into the cylinder 84 and forcing the piston 85 to discharge lubricant on the other side through the duct 81 into the valve chamber 86 between valve'heads 90 and 9| and thence through the discharge port 83 to the branch pipe leading to the bearing and thence to the bearing. After the piston has been forced from the position illustrated to its opposite position lubricant entering the feeder through port 8| maythen pass through the cylinder and through duct 95 into the valve chamber 85' into the annular passage surrounding the reduced portion of the dumb-bell type piston valve 92 between valve heads 93 and 94 from whence it will pass through duct 96 to the valve chamber 98 and through the valved outlet thereof to the passage leading to port llll'throughr which it will pass to the conduit and then on to the next feeder, and so on through all feeders in the circuit and thence reenter the automatic flow-reverser and circuit-indicating member 2 through dual-service port 13 into and through passage 12 and into the annular passage in valve chamber 34 surrounding the reduced portion 31 of the piston, valve 36 between valves 49 and 4| passing thereout through passage 66 into the valve chamber 6 where it encounters one head of the dumb-bell piston valve 6|. The flow moves this valve from the position shown in Figs, 2 and to its opposite position shown in Fig. 12, which permits the lubricant to pass through passage 62 into the cylinder 59 forcing it to shift the piston 56 from the-position shown in Figs. 1, 2, 4, 9 and 10 to its oppositeposition as shown in Figs.

11 and l2. Said shifting of the piston 58 shifts the piston valve59 and all its parts and causes the indicator 5'! to project a considerabledistance through the packing gland which seals the valve chamber 35 to the valve 51 and extension 51.

In order that the valve 6| may shift from the position shown in Figs. 2 and 10, lubricant inthe valve chamberil on the other side of the valve must be displaced, so it is free to pass through passage 61 and into the valve chamber 34 between valves 42 and 43 and thence through passages .19,

69, 63, port 64, pipe 5 and port 65 back to the "eitherdirection of flow.

position shown in Figs. 1, 2, 4, 9 and 10 to that shown in Figs. 11 and 12-, this causes the passage 33 to communicate, through the annularpassage in valve chamber 35 surrounding reduced portion 52 of pistonvalve 50, with passage 49, thus causing the valve 36 and all its parts to shift to the position shown in Figs. 11 and 12, and lubricant entering passage 32 will now be directed through valve chamber 34 and out through passage 12 and H port 13 and so on in the reverse manner. I

With the hand valve as illustrated in Fig; 3, the operator pumps until the indicator I I2 moves up and down on each stroke of the pump and thenhe shifts the valveand pumps again until the indicator moves, and he then knows that each bearing connected to the circuit has been lubricated twice. If he neglects to shift the valve the indicator will continue to move and he will simply' be pumping lubricant through the bypasses in the feeders and back into the reservoir. When the lubricant returns through passage Hi5 it moves the valve I08 to rise out of said passage I05 and as the piston valve I06 seals the passage H0, the lubricant passes through passages H4, H3 to port 64-and thence through the pipe 5 back to the reservoir. The spring returns the valves I06 and I08 to their normal seats when pressure is relieved, and no pressure can be placed on the spring until each feederin the circuit has satisfactorily discharged its measured quantity of lubricant to its associated bearing.

Many equivalent means will become apparent to those skilled in the art and I do not limit myself to the specific structures, numbers of feeders, bearings or parts shown, and I desire it to be understood that where the word lubricant is used in. the claims, any other fluid such as water, gas

and the like or any plastic material may be substituted and that any receptacle may be substituted for a bearing.

What, I claim is:- 1. The combination of a plurality of bearings to be lubricated, a series of feeders, one adjacent each of said bearings, a pipe line connecting each of said feeders and adapted at each end to receive lubricant under pressure, each of said from said member and returning thereto, and a lubricant discharging feeder connected to said conduit, said feeder having means for dischargthe lubricant is moved through the conduit in "3, In combination, apump, a flow-reversing and circuit-indicating member connected thereto, a conduit leading from said member and returning thereto and a lubricant discharging feeder connected to said 'conduit, said feeder having means' for discharging av quantity of lubricant to a bearing when the lubricant is moved through the conduit in either direction of flow.

4. In combination, a pump, a lubricant fitting connected thereto for receiving lubricant under pressure and having two discharge and return ports and means for alternately directing the.

lubricant out of one of said ports and then out of the other, a conduit leading'from one of the discharged and return ports of said fitting andv returning to the other of said ports, a lubricant ing a quantity of lubricant to a bearing when said devices supplying a quantity of discharging feederconneted to said conduit. said feeder having means for discharging, a quantity of lubricant to a bearing when the lu bricant is moved through the conduit in either direction of fiow, and means on the fitting for indicating when the means for alternately direct-- ing the lubricant out of one discharge port and then out of the other has been shifted.

'- ,5. The combination with a pump of a flow-- reversing member, a conduit leading therefrom and returning thereto; and a lubricant-discharging feeder connected to said conduit provided with means for first discharging a quantity of uncovering a passage permitting lubricant under pressure to now on through the conduit andback to the circuit-indicating and flow-reversing member.

v 7. The combination with a. pump of a' lubricant fitting connected thereto for'receiving lubricant under pressure, -a conduit leading from said.

fitting and returning thereto, a lubricant discharging feeder connected to said conduit provided with means for first discharging a quantity of lubricant to a bearing and for then uncovering a passage permitting lubricant under pressure to flow on through the conduit back to the lubricant fitting, and means in said fitting for reversing the flow through said conduit and means operated by said fiowreversing means for indicating that the system is working satisfactorily.

8. In combination, a pump, a lubricant fitting connected thereto for receiving lubricant therefrom under pressure, said fitting having two discharge ports and also having means for reversing the discharge of. lubricant therefrom, a conduit leading from one of the discharge ports of 'said fitting and returning to the other, a plurality of feeders connected to said conduit through which lubricant is discharged into bearings associated therewith, and bypassmeans insaid feeders permitting flow of lubricant under pressure from said fitting and through said conduit and feeders and back to said fitting, andmeans for indicating whether or not the conduit is broken.

9. The combination of a plurality of hearings to be lubricated, a series of measuring devices one adjacent each of said bearings, a pipe line connecting said devices and extending from each end of the series, a lubricant fitting for receiving lubricant under pressure and connected to the extending extremities of the pipe line, each of said devices supplying a measured quanaity of lubricant to its associated bearing and uncovering a passage to the pipe line leading to the next I 7 device of the series and back to the lubricant fitting, and means for, directing lubricant through said, pipe line and measuring devices in either direction of flow.

10. The combination of a plurality-of bearings to be lubricated, a series of measuring devices one adjacent each of said bearings, a pipe line connecting said devices and extending from each end of the series, a lubricant fitting for receiving lubricant under pressure and connected to the extending extremities of the pipe line, each of lubricant to its associated bearing and uncovering a passage to the pipeline leading to the next device of the series and backto the lubricant fitting, means for indicating when the lubricant has made a complete circuit from the lubricant fitting and through the pipe line and measuring devices and back to the lubricant fitting, and

'means for directing lubricant through said pipe' line and measuring devices in either direction of flow.

11. The combination with a pump, of a lubricant conduit extending therefromand returning thereto and provided with a pluralityof passageways adapted for connection to a plurality of bearings, means for reversing the flow through the conduit, means within the conduit for stopping the flowthrough the conduit when a; bearing towhich it leads is clogged, said means also sup-v plying a quantity of lubricant vto that bearing when it is not clogged and adapted to permit the s lubricant to flow on through the conduit after such measured quantity has been supplied to said bearing. p

12. The combination with'a pump, of a lubricant conduit extending therefrom and returning thereto and provided with a plurality of passage ways adapted for connection to a plurality of bearings, means for indicating when the lubricant has made a complete circuitthrough said conduit and for reversing the flow through the conduit, means within the conduit forstopping the.fiow through the conduit when a bearing to which it leads is clogged, said means also supplying a quantityof lubricant to that bearing when it is not clog ed and adapted to permit the lubricant to.fiow on through, the conduit after such measured quantity has been supplied to said bearing.

13. The combination with a pump, of a lubricant conduit extending therefrom and returning thereto, and provided with a plurality of passageways adapted' for connection to a plurality of bearings, automatic means for reversing the flow through the conduit, means within the conduit for stopping flow through the conduit when a bearing to which it leads is clogged, said means bearing when it is not clogged and adapted to permit the lubricant to flow on through the conduit, after such measured quantity has been supplied to the bearing. v

14. The combination with a pump of a lubricant conduit extending therefrom and returning 1 thereto and provided with a plurality of passageways adapted for connection to a plurality of bearings, automatic means for indicating when the lubricant has made a complete circuit through said conduit and for reversing the'flow through the conduit, means within the conduit for stopping the flow through the conduit when .a bearing to which it leads is clogged, said means also supplying a'quantity of lubricant .to that cant conduit extending therefrom and returning thereto and provided with a plurality of passageways adapted for connectionvto a plurality of' bearings, means for'indicating when the lubricant has made acomplete circuit through said conduitand hand operated means for reversing the flow through the conduit, means within the conduit for stopping the flow through the conduit when a bearing to which it leads is clogged, said means also supplying a-qua'ntity of lubricant to that bearing when it is not clogged and adapted to permit the lubricant to flow on through the conduit after such measured quantity has been supplied to that bearing.

16. A lubricating system comprising a singlepipe circuit connected to a flow-reversing 'member receiving lubricant under pressure, feeders arranged in series in said single-pipe circuit and forming part thereof, bearings connected to said feeders, saidfeeders having means for discharging a measured quantity of lubricant as 'a result each operation, andcan indicator for showing when the lubricant has passed through the entire circuit. 7

' 1'7. A lubricating system for supplying lubricant to a plurality of bearings, comprising a re- 'versible-flow single-pipe circuit and connectedto said bearings by relatively short branch pipes and receiving from said single-pipe circuit lubricant flowing under pressure first in one and then-in the opposite directioma flow-reversing member connected to the ends of said single-pipe, circuit forreceving lubricant under pressure for distribution through the sing e-pipe circuit to the re-' spective feeders and thence to bearings, said feeders embodyingmeans whereby discharge of a measured quantity of lubricant to the connected bearings ls insured upon each reversal of flow of the lubricant, a'tell-tale indicator mounted on said flow-reversing member that shows whether or not all connected bearings have" been lubricated,,said flow-reversing member functioning normally in changing direction of flow when the last feeder of the piping circuit has been served.

alternating flow andreturn ends of which are 18.,Thecombinations! a plurality of bearings to be lubr cated and a single-pipe flow-reversing lubricating system comprising a single-pipe main lubricant-distributing circuit, means for supplying lubricant thereto under-pressure, means'for reversing the direction of flow of lubricant in said.

circuit, lubricant feeders arranged in series in said main circuit and forming Part thereof, branch pipes connecting said feeders tothe bearings to be lubricated, means within' the feeders to insure discharge therefrom to the bearings connected therewith of a measured'quantity of lubricant uoon each reversal of the direction of flow of lubricant within said main circuit, the

connected to a flow-reversing member containing means for indicating obstruction to flow oi'iuhri cant to any one of the bearings.

19. The combination of a plurality of bearin to be lubricated, a plurality of feeders arranged in series onev adjacent each .01 said bearings, a conduit connected to each of said feedersat each end thereof, each of said feeders having an outlet ge communicating with its respective bearing and having a plurality of ports connected to said conduit ior'delivering lubricant thereto and therefrom under pressure. and having pressure operatedmeans' for delivering to a'bearing a predetermined quantity of lubricant entering eachfeederthrough. any of the said plurality ofports, and having means for directing lubricant under pressure .to flow through said device to another of said plurality of ports after forcing lubricant into the bearing to which it is connected, each of'said feeders beingadapted-to function when the lubricant is forced there-- through from either direction of 07! in th @0111 duit, and means in each end of the conduit for receiving lubricant under pressure.

20. Apparatus of the class des ribed compris ing a bodyahaving an inlet port for receiving lubricant under pressure and a pair of dual-serv ice ports for discharging lubricant to and for" receiving lubricantfrom a lubricant circuit and means for alternately directing lubricant from said body to the circuit first in one direction of flow and then in the other direction of flow.

.21. Apparatus of the class described compris-' ing a body'having an inlet port for receiving lubricant under pressure and a pair of dual-service ports for discharging lubricant to and for receiving lubricant from a lubricant circuit,

means for alternately directing lubricant from said body to the circuit first in one direction ofv flow and then in the other direction of flow, and

means for indicating when lubricant has been,

received from the circuit.

22. Apparatus of the class described compris ing a body'having an inlet port for receiving lubricant under pressure and a pair of dual-service ports for discharging lubricant to and for receiving lubricant from a lubricant circuit, means for alternately directing lubricant from saidbody ber adapted to connect the return discharge port with either of the dual service ports, said passages being so arranged that when one dualservice port is connected with the inlet port the other is connected to the return discharge port and manually operable means for shifting said valve.

v 34. A flow-reversing device comprising a body member having an inletport, a pair of dualservice ports adapted for connection to the ends of a circuit and a return discharge port, valve i means adapted to be alternated to connect the inlet port first to one andthen to the other of the dual-service ports while simultaneously connecting the return discharge port iirst'with one and then with the other'of the dual-service ports whereby, when the inlet port is connected to one dual-service port, the returndischarge port is connected to the other dual service port.

25. A flow-reversing device comprising a body member having an inlet" port, a pair of dualservice ports adapted for connection to the ends of a circuit, a return discharge port, valve means,

adapted to be alternated to connect theinle port first to one and then to-the other of the dual-service ports while simultaneously connecting the return discharge port first with one and then with the other of the dual-service ports:

whereby, when the inlet'port is connected to -,one 1 dual-service pbrt, the return discharge port is connected to the other dual service port and an indicating member operable by'the return pressure of the fluid for indicating when fluid is returning through the device.

26. In combination, a lubricant reservoir, '9. pump connected thereto adapted to pump lubricant therefrom, a-flow reversing member connected to said pump, a conduit leading from said member and returning thereto, a lubricant discharging feeder connected to said conduit, said feeder having means for discharging a quantity oflubricant to a hearing when the lubricant is moved through the conduit in either direction of flow, said flow-reversing member being adapted to discharge the returning lubricant into said reservoir. 7

27. In combination, a lubricant reservoir", a pump connected, thereto and adapted to pump lubricant therefrom, a flow-reversing member connected to said pump and having another connection direct to said reservoir, a conduit leading from said member and returning thereto, a lubricant discharging feeder connected to said'con leading from said member and returning thereto,

' and a lubricant discharging feeder connected to said conduit, said feeder having means for discharging a quantity of lubricant to 'a hearing when the lubricant is moved through the conduit in either direction of flow. I

29. In combination, a pump, 'a flow-reversing member connected thereto comprising a body having an inlet'and a pair of dual service ports and an exhaust, a primary valve means adapted to alternately connect the inlet with the respec- Q tive dual service ports, secondary valve means member connected thereto and receiving lubriv adapted to control said primary valve means by directing pressure thereto from said inlet and connecting means between said dual service ports and the secondary valve means, whereby the 1am ter is rendered operable, a conduit leading from one of the dual service ports of said flow-reverse ing member-and returning to the other, and a lubricant discharging feeder connected to said conduit, said feeder having means for discharging a quantity of lubricant to a bearing when the lubricant is moved through the conduit in either direction of flow. 1: I i Y 30. In combination, a pump, an automatically operated flow-reversing and circuit-indicating cant therefrom, a conduit leading from said member and returning thereto, and a lubricant discharging feeder connected to said conduit,. said feeder having means for discharging a quantity of lubricant to a bearing when the lubricant is moved through flow. 7 I

31. In combination, a pump, a flow-reversing and circuit-indicating member connected there' to and receiving lubricant therefrom, said mem ber having a movable part controlled by the re- I turn flow of lubricant therethrough, a conduit leading from said member and returning thereto, and a lubricant discharging feeder connected to said conduit, said feeder having meansfor discharging a quantity of lubricant to a bearing when the lubricant is moved through the conduit in either direction of flow.

32. In combination, a pump, a lubricant fittingconnected thereto having an inlet port for receiving lubricant underpressureand having two discharge and return ports and having automatically operated means controlled by the return flow the conduit in either directionof of lubricant under pressure for alternately directing the lubricant out of one ofsaid ports andthen out of the othei', a conduit leading from one ofthe discharge-and return 'ports of said fitting and returning to the other of said ports, a lubricant discharging feeder connected to said conduit, said feeder having means for discharging a quantityof lubricant to a bearing when the lu-- -bricant is moved through the conduit in either direction 'of flow, and means on the fitting for indicating when the means for alternately directing the lubricant out of one discharge and-return port and then out of the other has been shifted;

33. In combination, a pump, a lubricant fitting (15 connected thereto for receiving lubricant under pressure and having 'two discharge and return ports and having an automatically'operated flowreversing member controlled by the return flow of lubricant under pressure for alternately directing the lubricant out of one of said ports and then out of the other, a conduit leading from one of the discharge. and return ports of said fitting and returning to the other of said ports, a lubri cant discharging feeder connected to said conduit, said feeder having means for discharging a quantity of lubricant to a bearing when the lubricant is moved through the conduit in either direction of flow, and means on the fitting for indicating when the means for alternately directing the lubricant out of one discharge and return port and then out of the other has been shifted.

34. In combination, a pump, a lubricant fitting connected thereto for receiving lubricant under pressure and having two discharge and return ports and means for alternately directing the lubricant out of one of said ports and then out of the other, a conduit leading from one of the discharge and return ports-of said fitting and returning to the other of said ports, a lubricant discharging feeder connected to said conduit, said feeder having means for discharging a quantity of lubricant to a bearing when the lubricant is movedthrough the conduit in either direction of flow, and means on the fitting controlled by the pressure of lubricant returning thereto for indi-- cating when the means for alternately directing the lubricant out of one discharge port and then out of the other has been shifted, said means including a moveable member controlled by flow of lubricant'through said fitting.

35. The combination with a pump of an automatically operated flow-reversing member connectedthereto and receiving lubricant therefrom, a conduit leading from said member and'returning thereto, and a lubricant discharging feeder connected to said conduit provided with means forfirst discharging a quantity of lubricant to a bearing and for then uncovering a passage permitting lubricant under pressure to flow on through the conduit and back to the flow-fevers"- ing member.

36. The combination with a ,pump of an automatically operated circuit-indicating and 'fiowreversing member connected thereto and receiving lubricant therefrom, a conduit leading from said member and returning theretwand -a lubrl-- cant-discharging feeder connected to saidvconduit provided quantity of lub cant to abearing and for .then uncovering a p pressure to flow on through the conduit and back in means for first discharging a -to the circuit-indicating I and flow-reversing .mernber. Y

37.; 'I'he combination with a pump of a circuitage permitting lubricant under I member including amoveable part controlled by flow of lubricant therethrough, a conduit leading from said member and returning thereto, and a lubricant-discharging feeder connected to said conduit provided with means for first discharg, ing a quantity of lubricant to a bearing and for thenuncovering a passage permitting lubricant under pressure to fiow' on through the conduit and back to the circuit-indicating and flow-reversing member.

38. The combination with a pump of a lubricant fittingconnected thereto for receiving'lubri-f cant under pressure, a conduit leading from said fitting and returning thereto; a lubricant discharging feeder connected to said condult pro.- vided with means for first discharging a quantity of lubricant to a bearing and for then uncovering a passage permitting lubricant under cant fitting connected thereto for receiving lubricant under pressure, a conduit leading from said fitting and returning thereto, a lubricant discharging feeder connected to said conduit provided with means for first discharging a quantity of lubricant to a bearing and-for then uncovering a passage permitting lubricant under pressure to flow on through the conduit back to th'e lubricant fitting, and means in said fitting for reversing the flow through said conduit, said flow-re- 1 versing means including a moveable member that is automatically moved on each completion of flow of lubricant through said pipe-line from said fittlng and back thereto and moveable indicating means operated by the movable member of said flow-reversing means for indicating that the system is working satisfactorily.

40. In combination, a pump, a lubricant fitting connected thereto for receiving lubricant therefrom under pressure, said fitting having two discharge ports and also having adjustable means for alternately reversing the discharge of lubricant therefrom, a conduit leading from one'of the discharge ports of said fitting and returning to the other, a plurality of feeders connected to said conduit through which lubricant is discharged into bearings associated therewith, and bit-pass means in said feeders permitting flow of lubricant from said fitting and through said conduit and feeders and back to said fitting in either direction of fiow, and means including a member moveable by pressure of the return flow of lubricant for indicating whether or not the conduit is broken.

41. In combination, a pump, a lubricant fitting connected thereto for receiving lubricant therev from under pressure, said fitting having two discharge ports and also having automatically operated means for alternately reversing the discharge of lubricant therefrom, a conduit lead-' ing from one of the discharge portsoi said'fitting andreturning to the other, a plurality 'of feeders connected to saidfconduit through which lubricant isdischargedinto bearings associated therewith, and by-pass means in said feeders permitting fiow of lubricant under pressure from said fitting and through said conduit and feeders and back to said fitting in either direction of flow,

and means for indicating whether or not the conduit is broken.

, 42. In combination, a pump, a lubricant fitting connected thereto for receiving lubricant-therefrom under pressure; said fitting having two.

charge of lubricant therefrom, a conduit leading from one of the discharge ports of said fitting and returning to the other, a plurality of feeden s connected to said conduit through which lubricant is dischargedinto bearings associated therewith, and by-pass'means in said feeders permitting flowof lubricant under pressure from said fitting and through said conduit and feeders and back to said fitting in either direction of fiow, and a moveable member mounted on said fitting actuated by said flow-reversing means for indicating whether or not the conduit is broken. v

43. The combination of a plurality of bearlugs to be lubricated, a series of measuring devices one adjacent each of said bearings, a pipeline connecting said devices and extending from each .end of theseries, a lubricant fitting for receiving lubricant under pressure and connected to the extending extremities of the pipe-line, each of said devices supplying a measured quantity of lubricant to its associated bearing and uncovering a passage to the pipe-line leading to the next fitting when lubricant fiows therethrough in either direction of flow, and automatically operated means for directing lubricant through said pipe-line and measuring devices in alternate directions of flow.

44. The combination of a plurality of bearings to be lubricated, a series of measuring devices on'e adgiacent each of said bearings, a pipe-line' connecting said devices'and extending from each end i of the" series, a lubricant fitting for receiving lubricant under pressure and connected to the extending extremities of the pipe-line, each of said devices supplying a measured quantity of lubricant to its associated bearing and uncovering a passage to the pipe line leading to the next device of the series and back to the lubricant fitting when lubricant flows therethrough in either direction of flow, means for directing lubricant through said pipe-line and measuring devices in either direction of fiow, and a moveable circuit indicating member operable by the pressure of lubricant on completion of a circuit through'the pipe-line.

45. The combination of a plurality of bearings-"to be lubricated, a series of measuring devices one adjacent each of said bearings, a pipeline connecting said devices and extending from ,each end of the'series, a lubricant fitting; for re- "ceiving lubricant under pressure and connected to the extending extremities of the pipe-line, each of said devices, supplying a measured quantity of lubricant to its associated bearing and uncovering a passage to the pipe-line leading to the next device of the series and back to the lubricant fitting, indicatingmeans responsive to the flow of lubricant through the fitting for indicating when the lubricant has made a complete circuit ofbe'arings, indicatingmeans including a member moveable in response to the return flow of lubricant under pressure for indicating when the lubricant has'made a. complete circuit through said conduit, handoperat'ed means for reversing the flow through the conduitgmeans within-the conduit for stopping the flow-through the conduit when a bearing to which. it leads is clogged, saidmeans also Supplying a quantity of lubricant .to that bearing when it is not clogged and adapted to permit the lubricant to flow' on through cant to a plurality of bearings, comprising a rethe conduit after such measured quantity has been supplied to that bearing.-

47. A lubricant system comprising a singlepipe circuit having its respective ends connected to a flow-reversing member receiving lubricant under pressure, feeders arranged in series in said single-pipe circuit and forming part thereof, bearings connected to said feeders, said feeders having means-for discharging a measured quantity of lubricant as a result of each operation, and a moveable indicator for showing when 'the lubricant has passed through the entire circuit. 1

'48. A lubricating system for supplying lubriversible-flow single-pipe circuit, feeders arranged in series in said single-pipe circuit and conn'ected to said bearings by relatively short branch pipes and receiving from said single-pipe circuit lubricant flowing under pressure first in one-and then in the oppositev direction, aflow-reversing member connected tothe ends of said single-pipe circuit tor receivinglubricant under pressure for distribution through the single-pipe circuit to the respective feeders and thence to bearlngs,.said feeders embodying means whereby discharge of a measured quantity of lubricant to the connected bearings, is insured upon each reversal of flow of the lubricant, a moveable tell- 'tale indicator controlled by the return flow of lubricant-under pressure insaid flow-reversing member and mounted thereon that shows, whether or not'all connected bearings have been lubri-' cated, said flow-reversing member functioning ,normally in changing direction of flow when the last feeder of the piping circuit hasbeen served.-

49. The combination of a plurality of bearings to be lubricated and a single-pipe flow-reversing lubricating system comprising a single-pipe main lubricant-distributing circuit, means for supplying lubricant thereto under pressure, lubricant" feeders arranged 'in series in said main circuit and forming part thereof, branch'pipes connect.-

ing said feeders to'the bearings to be lubricated, means within the feeders to insure discharge,

' therefrom to the bearings connected therewith of a measured quantity of lubricant upon each reversal of the direction of flow of lubricant within said maincircuit, and a flow-reversing and circuit indicating member connected to the means for supplying lubricant under pressure, the ends of said circuit being connected to the flow-reversing and circuit indicating member, said member'having a part moveable in'response to the return .fiow of lubricant thereto from said circuit under pressure for indicating. the completion of 'a flow of lubricant through the circuit.

' 50. The combination of a plurality of bearings to be lubricated and a' single-pipe flow-reversing lubricating system comprising a single-pipe main lubricant-distributing circuit, means for supplying lubricant thereto under'pressure, means for reversing the direction of flow of lubricant insaid circuit, said means being operable automate ically upon return flow of lubricant thereto from the circuit, lubricant feeders arranged in series in said main circuit and forming part thereof, branch pipes connecting said feeders to the bearings to be lubricated,- and means within the feeders to insure discharge therefrom to the bearings connected therewith of a measured quan tity of lubricant upon each reversal of the direction of flow 1 of lubricant Within said main circuit, the ends of said circuit being connected to the means for reversing the direction of flow oi lubricant in said circuit, said reversing means including means for indicating the completion of a flow of lubricant through. the circuit.

51. In apparatus of the class described, a body having a pressure fluid inlet and a plurality of outlets and an exhaust, a. primary valve means .operableto alternately'connect the inlet with the respective outlets, secondary valve means adapted to control said primary valvemeans by directing pressure thereto from said inlet and from the primary valve means to said exhaust, a

conduit having the ends thereof connected to said outlets and through which pressure fluid is adapted to be-returned to said body by being forced through the conduit alternately in opposite directions, means responsive to pressure fluid being returned to said body thrbugh said conduit for. actuating said secondary valve, and valve "means rendered effective byactuation of said primary valve means for controlling said pressure responsive means. I

, 52. A fluid-distributing device comprising a body having an inlet port for receiving fluid under pressure and a pair of dual-service ports for discharging fluid to and for receiving fluid from a fluid-conveying circuit and automatically operfrom said device to the circuit firstin' one directionof flow and then in the other direction of flow;

53. A fluid-distributing device comprising a body having aninlet port for receiving fluid .under pressure and a pair of dual-service ports for discharging fluid to and for receiving fluid from a fluid-conveying circuit, automatically operated means for alternately directing fluid from said device to the circuit first in one direction of flow and then in the other direction of flow, and means for indicating when fluid has been received from the circuit.

54. A fluid-distributing device comprising a body having an inlet port for receiving fluid ated means for alternately directing lubricant under pressure and a pair of dual-service ports for discharging fluid to and'for' receiving fluid from a fluid-conveying circuit, automatically operated means for alternately directing fluid from said device to the circuit in one direction of flow and then in the other, and an indicator operated by said automatically operated alternating means for showing when lubricant discharged to the circuit has made a complete circuit there out of one and then out of the other of said pair of ports.

56. A fluid-distributing device comprising a body having an inletport for receiving fluid under pressure and a pair ofports for connection to a fluid-conveying circuit-,a' discharge port, pas- 'sages' connecting said ports, automatically operated means for alternately directing lubricant to the circuit first in one and then in the opposite direction of flow, and means for indicating when fluid has been received from the circuit.

57. A fluid-distributing device comprising a body having an inlet port for receiving fluid under pressure and a pair of ports for connection to a fluid-conveying circuit, a discharge port,

passages connecting said ports, automatically operated means for alternately directing fluid to the circuit first in one and then in the opposite direction of flow, and an indicator operated by said automatically operated alternating means for showing when lubricant discharged out of one of, the ports to the circuit has been received bythe device through the other of said ports.

58. A fluid distributing device comprising a body having an inlet port and a pair of dualservice ports for discharging fluid to and for receiving fluid from a fluid-conveying circuit, a

discharge port, passages interconnecting all of said ports, and automatically operated valve means for controlling said passages whereby connection is alternately established between the ,in-

let port and each of said ports to the circuit, said for controlling said passages whereby connection is alternately established between the inlet port and each of said ports to the circuit, said means,

upon each reversal thereof, simultaneously causing a discharge of fluid out of said discharge port, and means for indicating when fluid has been receiver from the circuit.

60. A fluid-distributing device comprising a body having an inlet port and a pair of dualservice ports for discharging fluid to and for receiving fluid from a fluid-conveying circuit and a discharge port, passages interconnecting all of said ports, automatically operated valve means for controlling said passages whereby connection is alternately established between the inlet port and each of said ports to the circuit, said means,

upon each reversal thereof, simultaneously causing a discharge of fluid out of said discharge port, and an indicator operated by said alternating means for showing whenfluid discharged out of one of the ports to the circuit has been received by the device through the other ofsaid ports.

61. A flow-reversing fluid-distributing device comprising a body member having an inlet port, a. pair of dual-service ports for delivering fluid to and for receiving fluid from a circuit, a return discharge port, a valve chamber communicating with the inlet port through a passagewayin the body member and. communicating with each of the dual-service ports through independent passageways in the body member, a second valve .chamber communicating with the inlet port through an independent passageway in the body member and communicating with each end of the first mentioned valve chamber through independent passageways in the body member, a third valve chamber communicating with the first mentioned valve chamber through two independent passageways in the body member, a cylinder and a piston reciprocable therein, each end of said cylinder communicating with the third mentioned valve chamber through suitable passageways in the body member, the body member having suitable outlet passages connecting each of said,

fluid from a circuit, a return discharge port, a

valve chamber communicating with the inlet port through a passageway in the body member and with each of the dual-service ports through independent passageways in the body member, a second valve chamber communicating with the inletport through anindependent passageway in the body member and communicating with each end of the first mentioned valve chamber through independent passageways in the body member, a third valve chamber communicating with the first mentioned valve chamber through two independent passageways in-the body member, a cylinder and a piston reciprocable therein, each end of said cylinder communicating with the third mentioned valve chamber through suitable passageways in the bodvmember, the body member having suitable outlet passageways from each of said valve chambers to the return discharge port, fluid pressure operated valve means in each of said valve chambers controlled by the movement of the piston in the cylinder whereby fluid will be directed to the circuit first in one direction of flow and after re-entering the device will then be directed to the circuit in the other direction of flow, and means indicating when the flow is reversed.

' 63. In a fluid, flow reversing device the combination of, a casing; apertures in said casing comprising an inlet port and two dual-service ports, fluid dispensing valve means movably dis- .posedin said casing 'for selectively dispensing injected fluid from said inlet portout of either one of said dual-service ports into the end of an associated line, and means responsive to the return of dispensed fluid into the alternate one of said dual-service ports for shifting said movable valve means to dispense the fluid out of said alternate one of said duel-service ports.

64. In a fluid flow reversing device the combination of, a casing, apertures in said casing comprising an inlet port and two dual-service ports, fluid dispensing valve means movably disposed in said casing for selectively dispensing injected fluid from said inlet port out of either one in said casing for selectivelydispensing injected fluid from said inlet port out of either one of fluid dispensing valve means movably disposed 1 ciated line, piston actuating means connected for shifting said movable dispensing valve means to dispense the fluid out of said alternate one of the dual-service ports, a control valve for controlling the admission of fluid pressureto either side of said actuating piston means and a control valve actuating piston responsive to the return of dispensed fluid from an associated line into the alternateone of said line ports for actuating said control valve.

66. In a fluid flow reversing device the combination of, a casing, apertures in said casing comprising an inlet port, two dual-service ports and an exhaust, fluid dispensing valve means movably disposed in said casing for selectively dispensing injected fluid from said inlet port out of either of said dual-service ports into the corresponding end of an associated circuit pipe line, actuator piston means connected for shifting said movable dispensing valve means to dispense the fluid out of said alternate one oi the dual-service ports, a control valve for controlling the admission of fluid pressure to either side of said actuating piston means, a control valve actuating piston responsive to the return of dispensed fluid from the alternate end of the associated circuitous pipe line into the alternate one of said dual-service ports for actuating said control valve and valve means leading the returned fluid alternately to one side and then to the other of the control valve actuating piston and controlling the discharge of fluid out of the exhaust port.

67. 'In combination in a device adaptedto reverse the flow of fluid throughout a circuit, a fluid dispensing valve, fluid pressure responsive actuator means for operating said dispensing valve, a control valve for applying fluid pressure to reversibly operate said actuator means and a fluid pressure responsive control valve actuator operable by pressure of fluid returning to said device after passing through the associated circuit.

68. A flow-reversing device comprising a body having an inlet port for receiving fluid under pressure and a pair of dual-service ports for discharging fluid to and for receiving fluid from a fluid conveying circuit and automatically operated means controlled by the flow of the fluid through the member for causing fluid entering said device through the inlet port first to be discharged from said device to the circuit through i one of said dual-service ports in one direction of flow while the other dual-service port acts as a return port for fluid returning from the circuit and-for then causing the fluid entering said device through the inlet port to be discharged from 1 1 said device to the circuit in the other direction of flow through the dual-service port which last acted as a return port while the returning fluid reenters said device through the dual-service port that first acted as a discharge port to the circuit. 69. In apparatus of the class' described, a body having a. pressure inlet and a plurality of outlets and an exhaust, a primary valve means adapted to alternately connect the inlet with the respective outlets, secondary valve means adapted to control said primary valve means by directing pressure thereto from said inlet and from the primary valve means to said exhaust, and connecting means between said outlets and the secondary valve means including valve elements of the primary valve means, said secondary valve means including means operablein response to pressure transmitted through the connecting means.

70. In a fluid flow reversing device the combination of, a casing, apertures in said casing comprising an inlet port and two line ports, fluid dispensing valve means movably disposed in said casing for selectively dispensing injected fluid from said inlet port out of one of said line ports into the end of an associated line, an actuating piston connected for shifting said movable dispensing valve means to dispense the fluid out of the other of the line ports, a control valve for controlling the admission of fluid pressure to the opposite ends of said actuating piston and a control valve actuating piston responsive to the return of dispensed fluid from an associated line into said other one of said line ports for actuating said control valve.

71. In combination in a. fluid flow reversing device, casing means, a fluid dispensing valve, a guiding aperture in said casing means forslldably receiving said fluid dispensing valve, port recesses opening into said guiding aperture comprising an inlet port and two line ports for connection with the ends of a fluid distributing line, an actuating piston connected to said dispensing valve, a guiding aperture in said casing means for slidably receiving said actuating piston, a control valve for applying fluid pressure to said actuating piston for reversely operating said fluid dispensing valve, a control valve actuating piston connected to said control valve, means controlled by said fluid dispensing valve for applying fluid returned from an associated line for reversibly operating said control valve actuating piston, and

drivlng means interconnecting said control valve and the control valve actuating piston for actuation when fluid pressure returns from an associated line into either one of said line ports.

DAVID R. HILLIS. 

